| Part of Speech | Definition | |
| Expression | 1. A furnace which depends on a natural draft and not on blast.[Websters]. | |
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Common Expressions: AIR FURNACE
| Expressions | Definition | ||
| Air furnace | A furnace which depends on a natural draft and not on blast. Source: Webster's Revised Unabridged Dictionary. | ||
Source: compiled by the editor from various references; see credits. | Top | ||
Specialty Expressions: AIR FURNACE
| Expressions | Domain | Definition | |
| Air furnace | Mining | Malleable-iron furnace. (references) | |
| Central warm air furnace | Energy | A type of space heating equipment where a central combustor or resistance unit generally using gas, fuel oil, or electricity provides warm air through ducts leading to the various rooms. Heat pumps are not included in this category. A forced air furnace is one in which a fan is used to force the air through the ducts. In a gravity furnace, air is circulated by gravity, relying on the natural flow of warm air up and cold air down; the warm air rises through ducts and the cold air falls through ducts that return it to the furnace to be reheated and this completes the circulation cycle. (references) | |
| Hot air furnace | Energy | A heating unit where heat is distributed by means of convection or fans. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
